Contractor Estimate Comparison Checklist
Give each contractor the same project description and compare identity, verified licensing and insurance, scope, materials, exclusions, permits, schedule, price structure, payment milestones, change-order rules, warranties, and references. Do not choose solely by the smallest total.
What to know
- Written estimates are comparable only when they describe the same work and material standard.
- Verify licenses with the issuing government and request proof of insurance rather than trusting printed numbers.
- Avoid full payment upfront, blank documents, undocumented changes, unexplained cash demands, and pressure to bypass permits.
Compare what each contractor will actually deliver, not just the total at the bottom of the page.
Give every bidder the same written project description. Include the work area, desired outcome, known damage, required material or performance level, items you will supply, access restrictions, desired schedule, cleanup expectations, photographs, and plans or measurements where available.
Different requests produce incomparable estimates. One contractor may price repainting while another prices repair, preparation, priming, and repainting.
Contractor identity
For each bidder, record:
- Legal business name
- Contact person
- Physical address
- Phone and email
- Website
- License number where required
- License status verified with the issuing government
- Insurance certificate requested
- References checked
- Complaint or enforcement history checked
- Estimate date and expiration date
FTC advises confirming licensing through the relevant state or county government and asking the contractor for proof of insurance. [1]
A printed license number is not the same thing as an active license verified with the issuing authority.
Scope comparison
Mark whether each estimate specifies:
- Exact work included
- Exact work excluded
- Demolition
- Protection of floors and furnishings
- Surface preparation
- Structural repair
- Electrical and plumbing work
- Finish work
- Cleanup and debris removal
- Disposal fees
- Final inspection
- Restoration of disturbed areas
- Owner responsibilities
FTC recommends multiple written estimates describing the work, materials, completion timing, and price. [1]
Materials
Record manufacturer, product line, model or grade, quantity, color or finish, efficiency or performance rating, allowances, substitution rules, ownership of unused material, and warranty documents.
An estimate stating “install quality windows” is not comparable with one naming dimensions, frame material, glazing, performance ratings, trim, flashing, and disposal.
Labor and subcontractors
Determine whether labor and supervision are included, which subcontractors will participate, whether specialty licenses are required, what working hours apply, how the site will be protected, who handles cleanup, and how the final punch list works.
Ask who is responsible for subcontractor payment and what lien-related documents are customary or required locally.
Permits and inspections
Identify required permits, who obtains them, whether fees are included, which inspection stages apply, whether code corrections are included, and who is responsible for final approval.
Be cautious when a contractor suggests avoiding a legally required permit to save time or money. Verify requirements with the responsible government office.
Schedule
Compare estimated start and completion dates, work sequence, material lead time, weather allowance, access requirements, delay notifications, owner changes, and treatment of hidden conditions.
FTC recommends putting estimated start and completion dates in the written agreement. [1]
Price structure
Determine whether the estimate is fixed price or time and materials. Record allowances, unit prices, taxes, delivery, equipment rental, disposal, permit fees, contingency, financing charges, and total estimated price.
For an allowance, ask what happens when the selected item costs more or less than the stated amount.
For time-and-materials work, request labor rates, material markup, equipment charges, documentation requirements, and any not-to-exceed limit.
Payment schedule
Record the deposit, progress payments, milestones, final payment, accepted method, documentation required before each payment, cancellation terms, and refund terms.
FTC warns against paying the full project amount upfront and notes that some states limit deposits. [1]
Do not pay through gift cards, unexplained cash demands, wire transfers, or payments to an unrelated person.
Change orders
The contract should explain who may authorize a change, the required written description, price effect, schedule effect, signature requirement, emergency procedure, and treatment of hidden damage.
Do not rely on “we will work it out later.” Later is a thriving habitat for invoices no one remembers authorizing.
Warranty
Compare workmanship and manufacturer warranties, duration, exclusions, transferability, claims process, labor coverage, diagnostic or shipping charges, and required maintenance.
A long warranty is less useful when the responsible business cannot be identified or exclusions consume most of the coverage.
References
Ask recent customers whether the final price resembled the contract, changes were documented, work started and finished reasonably, the site was protected, defects were corrected, permits and inspections were completed, and they would hire the contractor again.
Seek references from projects similar in type and scale to yours.
Red flags
Pause when a contractor appears after a disaster and pressures immediate action, demands full payment upfront, refuses a written contract, lacks verifiable identity, uses another person’s license, asks you to bypass permits, offers an unexplained dramatically lower price, asks you to sign blank forms, pressures unfamiliar financing, will not identify materials, or refuses written change orders.
FTC specifically advises against automatically selecting the lowest bid and recommends asking why estimates differ substantially. [1] [2]
Final comparison scorecard
Rate scope completeness, material specificity, verified credentials, insurance evidence, schedule credibility, payment risk, change-order clarity, warranty strength, reference quality, total cost, and communication.
Do not combine the ratings into a false scientific score unless the weights reflect your actual priorities. The cheapest estimate may omit half the work; the most expensive may simply be expensive.
Bottom line
The strongest estimate clearly identifies the business, scope, materials, schedule, permits, payments, changes, warranties, and exclusions before anyone begins tearing portions of your home apart.
Limits and cautions
- Contract, licensing, deposit, lien, permit, and cancellation rules vary by jurisdiction.
- This checklist does not replace legal review for a high-value or unusually complex contract.
Source notes
- How To Avoid a Home Improvement ScamFederal Trade Commission
- How To Avoid Scams After Weather Emergencies and Natural DisastersFederal Trade Commission
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